Sewer-trap-vent attachment.



No. 861,302. PATENTED JULY 30, 1907.

' H. J. MIBAGH.

SEWER TRAP VENT ATTACHMENT.

APPLICATION rum) wed, 1906 1 THE muuns PETERS ca, wnsnmomu, n. c.

l the United States, residing in the city and county of HENRY .l'.MIBAOH, OF SAN FRANCISCO, CALIFORNIA.

SEWER-TRAP-VENT ATTACHIMENT.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed August 1, 1906. Serial No- 328,756.

To all whom it may concern:

Be it known that I, HENRY J. MIBACH, a citizen of San Francisco andState of California, have invented new and useful Improvements inSewer-Trap-Vent Attachments, of which the following is a specification.

My invention relates to a vent attachment for sewer pipes.

It consists in the combination with a sewer pipe of a vent attachmentwhich is set out of line with the trap, and with means of access forcleaning the same.

Referring to the accompanying drawings for a more complete explanationof my invention, the figure is an elevation of my device.

A is a sewer trap of any usual or convenient construction. These trapsare usually set several feet below the basement extension. In order toprevent back pressure from the sewer and gas escaping therefrom into thebuilding, it is desirable to connect an air vent with the trap. If suchvent be connected directly in line with the trap, any foreign substanceintroduced into the upper open end of the trap, which is ordinarily on alevel with the sidewalk, will enter the trap and will clog the vent, andprevent the escape of gas.

It is the object of my invention to protect the vent from suchobstruction and to provide an easy means of cleaning it in case ofnecessity.

The trap A may have its opposite ends connected with the building andwith the sewer respectively.

Projecting upwardly from the trap is a coupling B; 2 is my air vent,which as shownis set out of line with the coupling B and is connectedtherewith by the curved pipe3. The open upper end of the vent 2 willthen lie in any usual position, and as the axis of the vent pipe is outof line with the trap and the opening B, it will be seen that anyrubbish which may blow or be otherwise carried into the vent-pipe 2,will fall into the lower part of said pipe and not interrupt the freepassage of air or gas through connection 3.

4 is a plug located at the lower end of the vent pipe 2, and this plugis in such position that it may easily be removed at any time for thepurpose of cleaning the pipe from any material, which it is desirable toremove.

By this construction, I first prevent the access of most, if not all, ofthe foreign matter into the trap and provide a receptacle for suchforeign matter, which receptacle is of such convenient access from theventpipe that it may be cleaned at any time without tearing out the trapor otherwise interfering with its ordinary functions.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is

The combination with a sewer-trap having opposite ends adapted to beconnected with ,a building and with a sewer respectively, and having acoupling projecting from its upper side, of an air-vent disposed in ahigher plane than the trap and its coupling, said vent being verticallydisposed and being set to one side of the vertical plane of thesewer-trap-coupling and having a curved pipe connecting its intermediateportion with said coupling, said air-vent being formed with a chamberbelow the curved pipe, and a removable plug forming a closure for thelower end of said chamber, for the purpose of cleaning the pipe from anymaterial which may enter said chamber through the upper end of the ventpipe.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HENRY .T. MIBACH. Witnesses:

WM. SWARTLEY, EDW. .T. MOLDRUI,

